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An ALMA survey of s...
An ALMA survey of sub-millimetre Galaxies in the Extended Chandra Deep Field South: the far-infrared properties of SMGs
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- Swinbank, A. M. (author)
- Durham University
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- Simpson, J. M. (author)
- Durham University
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- Smail, I. (author)
- Durham University
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- Harrison, C. M. (author)
- Durham University
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- Hodge, J. A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Karim, A. (author)
- Universität Bonn,University of Bonn
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- Walter, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Alexander, D. M. (author)
- Durham University
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- Brandt, W. N. (author)
- Pennsylvania State University
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- De Breuck, C. (author)
- European Southern Observatory (ESO)
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- da Cunha, E. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Chapman, S. C. (author)
- Dalhousie University
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- Coppin, K. E. K. (author)
- University of Hertfordshire
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- Danielson, A. L. R. (author)
- Durham University
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- Dannerbauer, H. (author)
- Universität Wien,University of Vienna
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- Decarli, R. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Greve, T. R. (author)
- University College London (UCL)
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- Ivison, R. J. (author)
- University of Edinburgh
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- Knudsen, Kirsten Kraiberg, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lagos, C. D. P. (author)
- European Southern Observatory (ESO)
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- Schinnerer, E. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Thomson, A. P. (author)
- Durham University
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- Wardlow, J. L. (author)
- Niels Bohr Institute
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- Weiss, A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- van der Werf, P. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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Durham University Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) (creator_code:org_t)
- 2013-12-17
- 2014
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 438:2, s. 1267-1287
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Abstract
Subject headings
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- We exploit Atacama Large Millimeter Array (ALMA) 870 mu m observations of sub-millimetre sources in the Extended Chandra Deep Field South to investigate the far-infrared properties of high-redshift sub-millimetre galaxies (SMGs). Using the precisely located 870 mu m ALMA positions of 99 SMGs, together with 24 mu m and radio imaging, we deblend the Herschel/SPIRE imaging to extract their far-infrared fluxes and colours. The median redshifts for ALMA LESS (ALESS) SMGs which are detected in at least two SPIRE bands increases with wavelength of the peak in their spectral energy distributions (SEDs), with z = 2.3 +/- 0.2, 2.5 +/- 0.3 and 3.5 +/- 0.5 for the 250, 350 and 500 mu m peakers, respectively. 34 ALESS SMGs do not have a >3 sigma counterpart at 250, 350 or 500 mu m. These galaxies have a median photometric redshift derived from the rest-frame UV-mid-infrared SEDs of z = 3.3 +/- 0.5, which is higher than the full ALESS SMG sample; z = 2.5 +/- 0.2. We estimate the far-infrared luminosities and characteristic dust temperature of each SMG, deriving L-IR = (3.0 +/- 0.3) x 10(12) L-circle dot (SFR = 300 +/- 30 M-circle dot yr(-1)) and T-d = 32 +/- 1 K. The characteristic dust temperature of these high-redshift SMGs is Delta T-d = 3-5K lower than comparably luminous galaxies at z = 0, reflecting the more extended star formation in these systems. We show that the contribution of S-870 mu m >= 1 mJy SMGs to the cosmic star formation budget is 20 per cent of the total over the redshift range z similar to 1-4. Adopting an appropriate gas-to-dust ratio, we estimate a typical molecular mass of the ALESS SMGs of M-H2 = (4.2 +/- 0.4) x 10(10) M-circle dot. Finally, we show that SMGs with S-870 mu m > 1 mJy (L-IR greater than or similar to 10(12) L-circle dot) contain similar to 10 per cent of the z similar to 2 volume-averaged H-2 mass density.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- number counts
- midinfrared
- similar-to 2
- molecular gas
- star-forming galaxies
- counterparts
- degree extragalactic survey
- galaxies: high-redshift
- luminosity function
- ultraluminous galaxies
- high-redshift
- galaxies: starburst
- large array
- galaxies: evolution
Publication and Content Type
- art (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Swinbank, A. M.
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Simpson, J. M.
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Smail, I.
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Harrison, C. M.
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Hodge, J. A.
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Karim, A.
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show more...
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Walter, F.
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Alexander, D. M.
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Brandt, W. N.
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De Breuck, C.
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da Cunha, E.
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Chapman, S. C.
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Coppin, K. E. K.
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Danielson, A. L. ...
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Dannerbauer, H.
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Decarli, R.
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Greve, T. R.
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Ivison, R. J.
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Knudsen, Kirsten ...
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Lagos, C. D. P.
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Schinnerer, E.
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Thomson, A. P.
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Wardlow, J. L.
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Weiss, A.
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van der Werf, P.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Monthly Notices ...
- By the university
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Chalmers University of Technology